Question

1. drag and drop the correct answers to each blank.

part of the atom location charge mass (kg)
nucleus 1.67 x 10^(-27)
neutron 1.67 x 10^(-27)
electron around the outside of the nucleus 9.11 x 10^(-31)

1. choose the best answer.

which subatomic particle has the smallest mass?
electrons
neutrons
protons

1. drag and drop to label the atom.

Explanation:

Step1: Recall proton properties

Protons are in the nucleus, have a charge of +1 and mass of $1.67\times 10^{-27}$ kg. So for the first row (missing charge), the answer is +1.

Step2: Recall neutron properties

Neutrons are in the nucleus, have a charge of 0 and mass of $1.67\times 10^{-27}$ kg. So for the second - row (location and charge), the location is nucleus and charge is 0.

Step3: Recall electron properties

Electrons are around the outside of the nucleus, have a charge of - 1 and mass of $9.11\times 10^{-31}$ kg. So for the third - row (charge), the answer is -1.

Step4: Answer question 7

Comparing the masses: mass of electron is $9.11\times 10^{-31}$ kg, mass of neutron is $1.67\times 10^{-27}$ kg and mass of proton is $1.67\times 10^{-27}$ kg. Since $9.11\times 10^{-31}<1.67\times 10^{-27}$, electrons have the smallest mass.

Step5: For question 8

The large central part of the atom is the nucleus, the particles within the nucleus are neutrons and the area around the nucleus is the electron - cloud.

Answer:

1. First row charge: +1; Second row location: nucleus, charge: 0; Third row charge: -1
2. electrons
3. Large central part: nucleus; Particles within nucleus: neutrons; Area around nucleus: electron cloud